The SEPTA subway–surface trolley lines are a collection of five SEPTA trolley lines that operate on streetlevel tracks in West Philadelphia and Delaware County, Pennsylvania, and also underneath Market Street in Philadelphia's Center City. The lines, Routes 10, 11, 13, 34, and 36, collectively operate on about 39.6 miles (63.7 km) of route.

SEPTA's Route 15, the Girard Avenue Line, is another streetcar line that is designated green on route maps but is not part of the subway–surface system.

Like Boston's Green Line and San Francisco's Muni Metro, the SEPTA trolley line is the descendant of a preWorld War II streetcar system. It also shares many similarities with the premetro and stadtbahn systems of continental Europe. Where Boston and San Francisco's systems use longer, articulated LRT vehicles, Philadelphia uses rigid vehicles roughly 4 feet (1,219 mm) longer than the PCC streetcar they replaced. The lines use Kawasaki Type K LRVs delivered in 198182. The cars are similar to those on Routes 101 and 102 100 series, SEPTA's suburban trolley routes, which were delivered around the same time. However, the subway–surface cars are singleended and use trolley poles, while the suburban lines use double ended cars and pantographs for power collection. ~Wikipedia

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